1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 178522231, compound

HRID 659781Notes

Reaction equation

HRID 659781 reaction equation
[N+:1]([C:4]1[C:5]([C:9]([OH:11])=O)=[N:6][NH:7][CH:8]=1)([O-:3])=[O:2].[NH2:12][C@H:13]1[CH2:18][CH2:17][C@H:16]([OH:19])[CH2:15][CH2:14]1.CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1>CN(C=O)C.C(Cl)Cl>[OH:19][CH:16]1[CH2:17][CH2:18][CH:13]([NH:12][C:9]([C:5]2[C:4]([N+:1]([O-:3])=[O:2])=[CH:8][NH:7][N:6]=2)=[O:11])[CH2:14][CH2:15]1

Participants

7

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 178511715HCID 178511715, compoundHCID 178524956HCID 178524956, compound

Product 1

HCID 178522231HCID 178522231, compoundYield 24.2%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

A mixture of 4-nitro-3-pyrazolecarboxylic acid (4.98 g, 31.7 mmol), trans 4-aminocyclohexanol (3.65 g, 31.7 mmol), EDAC (6.68 g, 34.8 mmol) and HOBt (4.7 g, 34.8 mmol) in DMF (120 ml) was stirred at ambient temperature for 16 hours. The mixture was reduced in vacuo, the residue taken up in CH2Cl2 and washed successively with 5% citric acid, saturated aqueous sodium bicarbonate, water and brine. The product was found to be mainly in the citric acid wash, which was basified and extracted with EtOAc. The organic layer was dried over MgSO4, filtered and evaporated to give a white solid, which was triturated with CHCl3 to give 1.95 g of 4-nitro-1H-pyrazole-3-carboxylic acid 4-hydroxy-cyclohexylamide. (LC/MS: Rt 1.62, [M+H]+ 255).

Workup

  1. washwashed successively with 5% citric acid, saturated aqueous sodium bicarbonate, water and brine
  2. washwash
  3. extractionextracted with EtOAc
  4. dry with materialThe organic layer was dried over MgSO4
  5. filtrationfiltered
  6. customevaporated
  7. customto give a white solid, which
  8. customwas triturated with CHCl3

Sources & evidence

ORD record
ord-3cada1c3cab94d1e96e908b992c46420
Source dataset
uspto-grants-2011_12
Patent number
US08080666B2

Reaction notes

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